Implement SDL platform, windowing and input handling

Source/Engine/Platform/SDL/SDLPlatform.h

@@ -0,0 +1,82 @@
+// Copyright (c) 2012-2024 Wojciech Figat. All rights reserved.
+
+#pragma once
+
+#if PLATFORM_SDL
+
+#include "Engine/Platform/Base/Enums.h"
+#if PLATFORM_WINDOWS
+#include "Engine/Platform/Windows/WindowsPlatform.h"
+#elif PLATFORM_LINUX
+#include "Engine/Platform/Linux/LinuxPlatform.h"
+#else
+#endif
+
+class SDLWindow;
+union SDL_Event;
+#if PLATFORM_WINDOWS
+typedef struct tagMSG MSG;
+#elif PLATFORM_LINUX
+union _XEvent;
+#endif
+
+/// <summary>
+/// The Windows platform implementation and application management utilities.
+/// </summary>
+class FLAXENGINE_API SDLPlatform
+#if PLATFORM_WINDOWS
+    : public WindowsPlatform
+{
+    using base = WindowsPlatform;
+#elif PLATFORM_LINUX
+    : public LinuxPlatform
+{
+    using base = LinuxPlatform;
+#else
+{
+#endif
+    friend SDLWindow;
+
+private:
+    static uint32 DraggedWindowId;
+
+private:
+    static bool InitPlatform();
+#if PLATFORM_LINUX
+    static bool InitPlatformX11(void* display);
+#endif
+    static bool HandleEvent(SDL_Event& event);
+#if PLATFORM_WINDOWS
+    static int __cdecl EventMessageHook(void* userdata, MSG* msg);
+#elif PLATFORM_LINUX
+    static int __cdecl X11EventHook(void *userdata, _XEvent *xevent);
+#endif
+
+public:
+    static bool CheckWindowDragging(Window* window, WindowHitCodes hit);
+#if PLATFORM_LINUX
+    static void* GetXDisplay();
+#endif
+    static bool UsesWayland();
+    static bool UsesXWayland();
+    static bool UsesX11();
+
+public:
+
+    // [PlatformBase]
+    static bool Init();
+    static void LogInfo();
+    static void Tick();
+    static void SetHighDpiAwarenessEnabled(bool enable);
+    static BatteryInfo GetBatteryInfo();
+    static int32 GetDpi();
+    static void OpenUrl(const StringView& url);
+    static Float2 GetMousePosition();
+    static void SetMousePosition(const Float2& pos);
+    static Float2 GetDesktopSize();
+    static Rectangle GetMonitorBounds(const Float2& screenPos);
+    static Rectangle GetVirtualDesktopBounds();
+    static Window* CreateWindow(const CreateWindowSettings& settings);
+};
+
+#endif